Three-dimensional numerical modeling of RTM and LRTM processes

Isoldi, Liércio André; Oliveira, Cristiano Peres; Rocha, Luíz Alberto Oliveira; Souza, Jeferson Ávila; Amico, Sandro Campos

doi:10.1590/s1678-58782012000200001

Cited by 22 publications

(25 citation statements)

References 11 publications

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“…In this work, the VOF solution is obtained with the FLUENT ® software -a general CFD (Computational Fluid Dynamic) package based on the Finite Volume Method (FVM) which includes a VOF module for the solution of problems with two or more immiscible fluids where the position of the interface between the fluids is of interest [23]. A single set of momentum equations is applied to all fluids, and the volume fraction of each fluid in every computational cell is tracked throughout the domain [4].…”

Section: Mathematical and Numerical Modelingmentioning

confidence: 99%

“…In this sense, several industrial techniques have been developed for the manufacturing of composite materials. Among them, liquid composite molding processes (LCM) such as resin transfer molding (RTM), light resin transfer molding (LRTM) and liquid resin infusion (LRI) processes have been widely applied to produce several components [1,2,3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Isoldi et al [4] performed a numerical study of the resin flow in RTM applications with a numerical code which does not have a specific RTM module. In this study, several cases were numerically solved and compared with analytical, experimental and numerical results.…”

Section: Introductionmentioning

confidence: 99%

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Geometrical evaluation of a resin infusion process by means of constructal design

Lorenzini¹,

Nardi²,

Amico³

et al. 2016

IJHT

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The resin infusion is a manufacturing technology usually applied to produce structures made of composite materials widely employed in automotive, marine and aerospace industries. This process consists on the injection of a polymeric resin in a closed mold composed of porous medium and non-porous channels, which facilitates the resin propagation along the mold domain. The main purpose here is to show that Constructal Design can be applied to guide the design of this kind of process. More precisely, it is investigated the influence of geometry of a two dimensional resin flow in I and T-shaped nonporous channels intruded into a rectangular plate composed of a porous medium over resin time injection along all domain, mimicking an infusion process. The I-shaped channel has one Degree of Freedom (DOF) while T-shaped channel has three DOFs. The other degree of freedom for both problems is the ratio between the height and length of the porous plate. For all simulations the ratio between the channel and plate volume is constant ( = 0.05). The conservation equations of mass and momentum for the resin-air mixture and one equation for transport of volumetric fraction of resin are solved with the Finite Volume Method (FVM). The interaction between the phases is treated with the method Volume of Fluid (VOF) and resistance of porous medium is taken into account with Darcy's law. Results showed that Constructal Design improves nearly 140 % and 139 % in resin time injection for I and T-shaped channels without formation of voids inside the plate domain. The best shape achieved with I-shaped channel is that one with higher penetration into the porous plate, as expected. However, for T-shaped channel an intermediate configuration led to the best results, contrarily to what was noticed for previous studies of cavities where the best shapes are obtained when the simple and bifurcated branches have the highest penetration inside the high resistance domain.

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Section: Mathematical and Numerical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geometrical evaluation of a resin infusion process by means of constructal design

Lorenzini¹,

Nardi²,

Amico³

et al. 2016

IJHT

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“…Neste sentido, diversas técnicas industriais foram desenvolvidas para a fabricação de materiais compósitos. É possível destacar os processos de Moldagem de Compósitos Líquidos (LCM), tais como Moldagem por Transferência de Resina -Resin Transfer Molding -(RTM), Moldagem por Transferência de Resina Light -Light Resin Transfer Moding -(LRTM) e Infusão de Resina Líquida (LRI) que têm sido amplamente aplicados para produzir vários componentes (Brouwer et al, 2003;Isoldi et al, 2012;Yenilmez et al, 2009;Poodts et al, 2013).…”

Section: Introductionunclassified

“…Poodts et al (2013) desenvolveram e validaram uma estrutura sanduíche, utilizando um código de elementos finitos por meio do software PAM-RTM e através da definição de um ensaio normalizado para a caracterização dos laminados para obter dados confiáveis de permeabilidade. Isoldi et al (2012) realizaram um estudo numérico do escoamento da resina em diversas aplicações de RTM, baseando-se no método (VOF -do inglês: Modelo Volume of Fluid) e utilizando o software comercial FLUENT. Neste estudo, vários casos foram resolvidos numericamente e comparados com outros resultados analíticos, experimentais e numéricos da literatura.…”

Section: Introductionunclassified

Avaliação Geométrica De Canais Retangulares Em Um Processo De Infusão Por Resina

Magalhães¹,

Amico²,

Rocha³

et al. 2015

Procedings of the XXXVI Iberian Latin American Congress on Computational Methods in Engineering

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Flow front advancement during composite processing: predictions from numerical filling simulation tools in comparison with real-world experiments

et al. 2015

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Liquid composite molding (LCM) techniques are innovative manufacturing processes for processing fiber reinforced polymer parts used e.g. for aerospace structures. Thereby the reinforcing material is placed in a mold and infiltrated with a low viscosity polymer matrix. Increasing production rates as well as part complexity lead to high production risks such as air inclusions or incomplete mold filling. Numerical mold filling simulations are promising tools enabling the composite manufacturing engineer to detect dry spots in the mold and find the optimal positions of the resin entry and ventilation system at an early process development stage. Today, different numerical models and software packages are available for modeling the flow through the reinforcing structure for visualization of the flow behavior. The goal of this study is the systematic comparison of two different software packages, namely PAM‐RTM® and OpenFOAM. Both software tools are operated as they are commonly foreseen. Real world experiments under real process conditions are the basis for the assessment of the numerical predictions. The resin transfer molding (RTM) experiments are executed in a tool with a transparent upper mold half in order to see the flow front advancement. POLYM. COMPOS., 37:2782–2793, 2016. © 2015 Society of Plastics Engineers

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Three-dimensional numerical modeling of RTM and LRTM processes

Abstract: Resin Transfer Molding (RTM) is a manufacturing process in which a

Cited by 22 publications

References 11 publications

Geometrical evaluation of a resin infusion process by means of constructal design

Geometrical evaluation of a resin infusion process by means of constructal design

Avaliação Geométrica De Canais Retangulares Em Um Processo De Infusão Por Resina

Flow front advancement during composite processing: predictions from numerical filling simulation tools in comparison with real-world experiments

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